Show specifically what's missing before submit-for-verification

The disabled-button hint just said "Complete all required fields to
submit" with no indication of which section was incomplete. For job
seekers, portfolio completion (headline, summary, education, work
experience, skills — filled in via My Portfolio, a separate page from
this one) is required alongside Basic Info and Documents, so seeing
both visible tabs fully checked while submit stays disabled looked
like a bug. Now names the actual missing items.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/components/dashboard/ProfilePage.tsx

@@ -1330,7 +1330,13 @@ export default function ProfilePage(props: Props) {
             </button>
             <Show when={!canSubmitVerification() && !submitting()}>
               <span style={{ "font-size": "12px", color: "#9CA3AF" }}>
-                Complete all required fields to submit
+                {(() => {
+                  const parts: string[] = [];
+                  if (missingBasicLabels().length) parts.push(missingBasicLabels().join(", "));
+                  if (missingDocLabels().length) parts.push(missingDocLabels().join(", "));
+                  if (missingPortfolioLabels().length) parts.push(`${missingPortfolioLabels().join(", ")} (in My Portfolio)`);
+                  return parts.length ? `Missing: ${parts.join("; ")}` : "Complete all required fields to submit";
+                })()}
               </span>
             </Show>
           </div>